body {
    background-color: #f8f9fa;
    font-family: 'Microsoft YaHei', sans-serif;
}

.card {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border: 1px solid rgba(0, 0, 0, 0.125);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.table th {
    background-color: #e9ecef;
    border-color: #dee2e6;
    font-weight: 600;
    text-align: center;
}

.table td {
    text-align: center;
    vertical-align: middle;
}

.table-responsive {
    max-height: 600px;
    overflow-y: auto;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

#last-updated {
    font-size: 0.9rem;
}